Specifications

AP Overview
RoamAbout Mobility System Software Configuration Guide 9-11
Example AP Boot over Layer 2 Network
Figure 9‐1showsanexampleofthebootprocessforanaccesspointconnectedthroughaLayer 2
network.TheRoamAboutSwitches(RAS1,RAS2,andRAS3)eachhaveaDistributedAP
configurationfortheAP.
Figure 9-2 AP Booting over Layer 2 Network
1. TheAPsendsaDHCPDiscovermessagefromtheAP.
2. TheDHCPserverreceivestheDiscovermessage(through
arelayagent)andreplieswitha
DHCPOffermessagecontainingIPaddressfortheAP,therouterIPaddressfortheAP’sIP
subnet,theDNSserveraddress,andthedomainname.APthensendsaDHCPRequest
messagetotheserverandreceivesanAckfromtheserver.
3. The
APsendsabroadcastFindRASmessagetoIPsubnetbroadcastaddress.
4. RAS1andRAS3havehighpriorityfortheAPandreplyimmediately.
5. TheAPcontactsRAS1anddetermineswhetheritshouldusealocallystoredoperational
imageordownloaditfromtheRoamAboutSwitch.
RAS1iscontactedbecauseit
hasfeweractiveAPconnectionsthanRAS3.Oncetheoperational
imageisloaded,theAPrequestsconfigurationinformationfromRAS1.
Router
Router
System IP address
10.10.10.4
RAS1
Layer 2
System IP address
10.10.40.4
RAS2
Layer 2
System IP address
10.10.50.4
RAS3
DHCP Server
DAP 1
serial_id 0322199999
model AP3000
bias = high
DAP 1
serial_id 0322199999
model AP3000
bias = low
ser
ial_id 0322199999
model AP3000
2
4
1
DAP 1
serial_id 0322199999
model AP3000
bias = high
3
5
Layer 2
active APs = 49
active APs = 34
active APs = 62
AP